不带时钟芯片的万年历设计.doc

摘 要 单片机具有体积小、重量轻、价格便宜、功耗低、控制功能强及运算速度快等特点，在人们生活的各个领域得到了广泛的应用。而多功能电子万年历作为一种非常广泛日常计时工具，是单片机比较典型的一类应用。 电子万年历可以对年、月、日、周、时、分、秒进行计时，并将时间以数字的方式直观的显示出来。相较于传统的钟表误差大、使用寿命不长、要经常的更改时间显示不直观万年历软、硬件结合，误差小、使用寿命长简捷明了。4k Bytes片内程序存储128 bytes的随机存取数据存储器32个外部双向输入/输出口Abstract The microcontroller has some features,including small size, light weight, cheap price, low power consumption, the controlling function and computing speedly, so it has been widely applied in various fields of peoples lives. The multi-function electronic calendar as a very wide range of daily timing tool is the typical microcontroller applications. Electronic calendar can be timing on year, month, day, week, hours, minutes, seconds. Compared to the traditional watch, which has some shortcomings , such as short life ,changing the time ,displaying intuitively,calendar are undoubtedly more popular，because its features include soft-and hardware combined, small error, long life, simple to understand. In the design I was designing the parts of hardware and software synchronously. The hardware includes the AT89C52 microcontroller, LCD display circuit, and adjust button circuit. The AT89C52 microcontroller with 4k Bytes on-chip program memory, 128 bytes of random access data memory as well as 32 ??external bi-directional input / output ports, is suitable for many of the more complex control applications. The software part is divided into the main program, the LCD driver, and its definition and representation of the LCD dot matrix. Keywords：Microcontroller;Calendar;Liquid Crystal Display 目 录 摘 要 I Abstract II 目 录 III 第1章 绪论 1 1.1 课题研究背景与意义 1 1.2 国内外发展现状 2 1.3 论文结构安排 3 第2章 方案选择及设计 5 2.1 设计要求 5 2.2 方案比较与选择 5 第3章 硬件电路设计 8 3.1 单片机概况 8 3.2 单片机基本结构 9 3.3 模块分析 13 3.4 电路原理图 17 第4章 软件设计 18 4.1 编程方式选择 18 4.2 主程序设计 18 4.3 按键子程序设计 20 4.4 字体的点阵实现 27 4.5 定时中断时间逻辑程序设计 30 第5章 系统的实现及其仿真验证 34 5.1 系统在Proteus下总电路图 34 5.2 结果显示 35 第6章 总结与展望 37 5.1 总结 37 5.2 展望 37 参考文献 39 致谢 40 附录一 41 英文原文 41 附录二 46 中文译文 46  第1章 绪论 1.1 课题研究背景和意义 在当代繁忙的工作